plant tissue culture & genetics

Speciation & Origin of Genomes

Genomes have evolved in nature and populations in the past as well as in modern schedule have been evolving. There are many ways of origin of species in nature and the parental genome is developed and modified. Some of these natural processes include genetic mutations, polyploidy, especially natural hybridizations, chromosomal aberrations and corresponding many inherent molecular mechanisms operative within individuals. Many of these events have sometimes resulted in “genomic reshuffle” causing expressions of those DNA sequences which were once present in the distant past geological history (many years ago). Such several examples are prevalent among plants and animals. Additionally, evolutionary mechanisms have evolved such organisms which are either connecting links between groups (&)or are unique amalgamated genomes such as Platypus among animals. In the past few years, some rare plants have shown the presence of a few DNA stretches matching the DNA sequences on the human chromosomes.